Known plaintext - XOR

20 Points  

For this challenge you will need to decypher a simple XORed picture.

Author

Ryscrow,  

Level  Difficulty

Validations

3585 Challengers 4%

Note  Notation

174 Votes
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Challenge Results Challenge Results

Pseudo Challenge Lang date
hekmil   Clair connu - XOR fr 10 December 2018 at 15:17
arildo   Known plaintext - XOR en 10 December 2018 at 15:11
debaibi   Known plaintext - XOR en 10 December 2018 at 00:33
bs00   Clair connu - XOR fr 9 December 2018 at 19:55
Tech4   Known plaintext - XOR en 9 December 2018 at 11:12
alestorm980   Known plaintext - XOR es 8 December 2018 at 21:23
HUVy5tgd6GT2   Known plaintext - XOR en 8 December 2018 at 21:01
WTFast   Known plaintext - XOR en 8 December 2018 at 16:18
strate9y   Known plaintext - XOR en 7 December 2018 at 19:23
YoSo   Clair connu - XOR fr 6 December 2018 at 21:13

Challenges associated with this section 43 Challenges

Results Challenge's Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 28% 28766 5 Xartrick 10
pas_valide Encoding - UU 22% 23085 5 g0uZ 10
pas_valide Hash - Message Digest 5 23% 23833 5 g0uZ 6
pas_valide Hash - SHA-2 12% 12100 5 koma 3
pas_valide Shift cipher 7% 7131 10 m31z0nyx 5
pas_valide Pixel Madness 6% 5818 15 Ryscrow 10
pas_valide ELF64 - PID encryption 4% 3526 15 Lu33Y 10
pas_valide File - PKZIP 5% 4299 15 g0uZ 5
pas_valide Monoalphabetic substitution - Caesar 6% 5691 15 Arod 4
pas_valide Known plaintext - XOR 4% 3585 20 Ryscrow 4
pas_valide Code - Pseudo Random Number Generator 2% 1347 20 Tosh 4
pas_valide File - Insecure storage 1 5% 4262 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 3897 20 Arod 3
pas_valide System - Android lock pattern 3% 2462 20 Silentd 3
pas_valide Transposition - Rail Fence 3% 2311 20 YellowS4 2
pas_valide AES - CBC - Bit-Flipping Attack 1% 124 25 Tie21 1
pas_valide AES - ECB 1% 992 25 cez40 4
pas_valide LFSR - Known plaintext 1% 138 25 Brissouille 1
pas_valide RSA - Factorisation 2% 1582 25 HacKSpider 4
pas_valide RSA - Decipher Oracle 1% 368 25 Zweisamkeit 3
pas_valide Service - Timing attack 2% 1235 25 g0uZ, koma 3
pas_valide Monoalphabetic substitution - Polybe 2% 1370 25 koma 6
pas_valide Initialisation Vector 1% 706 25 notfound, manticore 3
pas_valide GEDEFU 1% 221 30 makhno 1
pas_valide RSA - Corrupted key V1 1% 82 30 blackndoor 1
pas_valide RSA - Continued fractions 1% 559 30 sambecks 1
pas_valide RSA - Common modulus 1% 454 30 franb 2
pas_valide Service - Hash length extension attack 1% 333 30 koma 1
pas_valide AES - 4 Rounds 1% 44 35 Cryptanalyse 0
pas_valide RSA - Padding 1% 101 35 Tosh 0
pas_valide AES128 - CTR 1% 324 40 Tosh 1
pas_valide Discrete logarithm problem 1% 419 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key V2 1% 58 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 457 40 franb 3
pas_valide AES - Fault attack #1 1% 21 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 79 50 peyman 0
pas_valide ECDHE 1% 83 60 Tosh 2
pas_valide Service - CBC Padding 1% 519 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 228 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 40 60 Cryptanalyse 1
pas_valide AES - Weaker variant 1% 16 70 Cryptanalyse 0
pas_valide Hash - SHA-3 1% 44 75 Revenger 1
pas_valide AES - Fault attack #2 1% 14 80 Cryptanalyse 0